Abstract
Abstract Context.—Cribriform-morular variant of papillary thyroid carcinoma (CMVPTC) is one of the rare types of papillary carcinoma. It has been associated with familial adenomatous polyposis, though it can also occur sporadically. The molecular pathogenesis of this tumor is incompletely understood. It appears that there can be molecular contributions from the RET/PTC translocations and from mutations in the APC gene and β-catenin gene, which are both part of the Wnt signaling pathway. However, one of the most common mutations in papillary carcinoma, the BRAF mutation, has not been reported in this variant of papillary carcinoma. Objective.—To investigate the BRAF mutational status in CMVPTC. Design.—Four cases of CMVPTC (1 associated with familial adenomatous polyposis and the others apparently sporadic) were identified from the files of 3 large centers. Deoxyribonucleic acid was extracted and successfully amplified from each case. The polymerase chain reaction products were sequenced and evaluated for ...
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